With the latest version of Macintosh Manager / Multiple Users (1.3), there's apparently an additional technique available to accommodate older software (without the system-wide benefits and/or drawbacks of the Security Bypass Extension 1.3 mentioned by Adam above). See the description of the special "Other Applications•" folder in the MM/MU 1.3 Read Me
. This special folder is supposed to function much like the "Application Support" folder (in the System Folder), but it's located outside the System Folder. I've never tried using this folder, so I don't know how well it works; it probably won't help with severly MU-challenged programs.
In any case, note that Apple's MU wasn't really designed for very advanced security needs. If many of OnGuard's more powerful features that you mentioned (such as full copy-prevention) are mandatory for your lab, I guess you could try contacting Power On Software's Support
if you haven't already done so, to see if they have any specific troubleshooting advice for your configurations.
Otherwise, as you probably know, there are also several altenative commercial workgroup/security products available -- e.g., as discussed on the Macintosh Security
web site. However, I don't know if these products work with the newer Macs any better than OnGuard.
[On a personal note, I wish that there had been better news about OnGuard because I'd been thinking of switching from Apple's MU to OnGuard at some point when I upgrade my household's Mac. Apart from the (somewhat understandable) issues with older software that led to Apple releasing the Security Bypass Extension, the current version of MU still has quite a few other problems related to "forgetting" users' settings.]
[This message has been edited by Paul Crawford (edited 11-18-2000).]